/*
* lifegame.c
*
* Created on:
* Author:
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "lifegame.h"
/* hard-coded world size */
#define WORLDWIDTH 39
#define WORLDHEIGHT 20
/* character representations of cell states */
#define CHAR_ALIVE '*'
#define CHAR_DEAD ' '
/* current cell states of the world 当前状态*/
static int world[WORLDWIDTH][WORLDHEIGHT];
/* next generation cell states 下一代状态*/
static int nextstates[WORLDWIDTH][WORLDHEIGHT];
/* functions to write for Part B of lab */
void initialize_world_from_file(const char * filename) {
/* TODO: read the state of the world from a file with
name "filename". Assume file exists, is readable, and
the ith character of the jth line (zero-indexed) describes
world[i][j] according to the characters CHAR_ALIVE and
CHAR_DEAD
Assume a line does not contain more than 256 characters
(including newline). If a line doesn't contain WORLDWIDTH
characters, remaining cells in line are presumed DEAD.
Similarly, if the file does not contain WORLDHEIGHT lines,
remaining lines are presumed dead.
On error, print some useful error message and call abort().
Also need to reset the next generation to DEAD
*/
FILE *fp;
char buffer[WORLDWIDTH];
int i, j, line;
if ( (fp=fopen(filename,"r")) == NULL){
fprintf(stderr, "open file: %s error\n",filename);
return;
}
/* initial world */
for (i = 0; i < WORLDWIDTH; i++)
for (j = 0; j < WORLDHEIGHT; j++)
world[i][j] = nextstates[i][j] = DEAD;
line= 0;
while(line < WORLDHEIGHT
&& fgets(buffer,WORLDWIDTH,fp) != NULL){
//printf("buffer:%s\n", buffer);
for(j = 0; j < WORLDWIDTH; j++){
if(CHAR_ALIVE == buffer[j]){
world[j][line] = ALIVE;
//printf("line: %d\tj: %d\n", line, j);
}
}
line++;
}
//output_world();
if(0 != fclose(fp))
printf("fclose error\n");
}
void save_world_to_file(const char * filename) {
/* TODO: write the state of the world into a file with
name "filename". Assume the file can be created, or if
the file exists, overwrite the file. The ith character
of the jth line (zero-indexed) describes world[i][j]
using the characters CHAR_ALIVE and CHAR_DEAD
This file should be readable using the function
initialize_world_from_file(filename) above; we can use
it to resume a game later
*/
FILE *fp;
char buffer[WORLDWIDTH+1] = "\0";
int i, j;
if ( (fp=fopen(filename,"w")) == NULL){
fprintf(stderr, "open file: %s error\n",filename);
return;
}
for (i = 0; i < WORLDHEIGHT; i++) {
for (j = 0; j < WORLDWIDTH; j++)
buffer[j] = world[j][i] == ALIVE ? CHAR_ALIVE : CHAR_DEAD;
fprintf(fp, "%s\n", buffer);
}
if(0 != fclose(fp))
printf("fclose error\n");
}
/* you shouldn't need to edit anything below this line */
/* initializes the world to a hard-coded pattern, and resets
all the cells in the next generation to DEAD */
void initialize_world(void) {
int i, j;
for (i = 0; i < WORLDWIDTH; i++)
for (j = 0; j < WORLDHEIGHT; j++)
world[i][j] = nextstates[i][j] = DEAD;
/* pattern "glider" */
world[1][2] = ALIVE;
world[3][1] = ALIVE;
world[3][2] = ALIVE;
world[3][3] = ALIVE;
world[2][3] = ALIVE;
}
int get_world_width(void) {
return WORLDWIDTH;
}
int get_world_height(void) {
return WORLDHEIGHT;
}
int get_cell_state(int x, int y) {
if (x < 0 || x >= WORLDWIDTH || y < 0 || y >= WORLDHEIGHT)
return DEAD;
return world[x][y];
}
void set_cell_state(int x, int y, int state) {
if (x < 0 || x >= WORLDWIDTH || y < 0 || y >= WORLDHEIGHT) {
fprintf(stderr,"Error: coordinates (%d,%d) are invalid.\n", x, y);
abort();
}
nextstates[x][y] = state;
}
void finalize_evolution(void) {
int x, y;
for (x = 0; x < WORLDWIDTH; x++) {
for (y = 0; y < WORLDHEIGHT; y++) {
world[x][y] = nextstates[x][y];
nextstates[x][y] = DEAD;
}
}
}
void output_world(void) {
char worldstr[2*WORLDWIDTH+2];
int i, j;
worldstr[2*WORLDWIDTH+1] = '\0';
worldstr[0] = '+';
for (i = 1; i < 2*WORLDWIDTH; i++)
worldstr[i] = '-';
worldstr[2*WORLDWIDTH] = '+';
puts(worldstr);
for (i = 0; i <= 2*WORLDWIDTH; i+=2)
worldstr[i] = '|';
for (i = 0; i < WORLDHEIGHT; i++) {
for (j = 0; j < WORLDWIDTH; j++)
worldstr[2*j+1] = world[j][i] == ALIVE ? CHAR_ALIVE : CHAR_DEAD;
puts(worldstr);
}
worldstr[0] = '+';
for (i = 1; i < 2*WORLDWIDTH; i++)
worldstr[i] = '-';
worldstr[2*WORLDWIDTH] = '+';
puts(worldstr);
}
|
